Demitry mindeleff



Sterne PATENT Fries,

DEMITRY MINDELEFF, or SAN FRANCISCO, CALIFORNIA.

' SEECIFICATION forming part of Letters Patent No. 437,499, dated September 39, 1890i Application filed June 11, 1890. Serial No, 355,062. (No specimens.)

In all whom it may concern:

Be it known that I, DEMITRY MINDELEFF, of San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Explosive Compounds; and I do hereby declare that the followingis a full, clear, and exact description thereof.

My present invention is an improvement in T6 explosives; and its object is toproduce a high-power explosive which will be largely insensitive to concussion;and it consists, essentially, in combining with nitro-glycerine alcohols, preferably methyl alcohol, which insensitizes the nitro-glycerine, and pyroxyline, as will be hereinafter explained and claimed.

In preparing this explosive I take from twenty to twenty-ii ve per cent. of intro-glycer- -ine and seventy-five to eighty per cent. of :0 methyl alcohol and mix the same, and then to about each one hundred cubic centimeters of the latter mixture I add from seven to ten grams of soluble pyroxyline and agitate the .mass until all the pyroxyline is dissolved, keepz'5 ing the mixture eta temperature of from about to ce'ntigrade-not exceeding 40 centigrade. The resultant product will have a jelly-like appearance and consistency, and to this product I add gradually, during continu- 30 Oil-S agitation thereof, nitro-glycerine in such quantities as to result in amixture containing about seventy or seventy-five per cent. nitrm glycerineand twenty-five to thirty per cent.

' of methyl alcohol. This mixture is in itself a 35" powerful and insensitive explosive, and in order to increase its density I add thereto about .as much soluble pyroxyline as the mixture will dissolve. z

- When nitro-glycerine is the second time .59 added to 'thgesolution, as above, the pyroxyline will first separated-self, but will, with time and agitation, gradually rcdissolvc. Tho final product constitutes a most powerful explosive and has a fluid orsemi-iluid consistency.

If it is desired to make the explosive plastic Ignited in the open air, it will v about 280 centigrade, when itexplodes. In

exploding shells, cartridges, 850.,- the aid of both concussion and fire is employed.

Having described my invention, what I claim as new, and desire to secure by Letters Patent thereon, is-

1. An'explosive compound consisting of a combination of nitro-glycerine, an alcohol, and a soluble explosive, substantially as described. 2. Anexplosivc compound consisting of a combination-of nitro-glycerine' and an alcohol, and pyroxyline, substantially as descrihed. v Q

3. An explosive compound consisting of a combination of nilro-glycerine and methyl alcohol and pyroiiyline, substantially as described. a

In testimony that I claim the foregoing as my own I afiix my signature in presence of two witnesses.

n. MINDELEFF, 

